Seize cutting-edge file (5)

I believe the answer is:

grasp

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'seize' is the definition.
(I've seen this before)

'cutting-edge file' is the wordplay.
'cutting-edge' becomes 'g' (I can't justify this - if you can you should give a lot more credence to this answer).
'file' becomes 'rasp' (rasp is a kind of file).
'g'+'rasp'='GRASP'

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(Other definitions for grasp that I've seen before include "Support; rugby player" , "Seize firmly - or understand (5)" , "Firmly grip" , "Hold - understanding" , "Take firm hold" .)

I've seen this clue in the Sydney Morning Herald.

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